Straightening-machine.



j B. BOYKIN, JB. STRAIGHTENING MACHINE.

APPLICATION FILED NOV. 19, 1913.

1,096,349. Patented May 12,1914.

MZ f4 o 7l Inventor Attorneys BURWELL BOYKIN, JR., OF BEAUMONT, TEXAS.

STRAIGHTENING-MACHINE.

Specification of Letters Patent.

Patented M ay 12, 191.4.

Application filed November 19, 1913. Serial No. 801,899.

To all t0/tom it may concern.'

Be it known that I, BURWELI. BoYuiN, Jr., a citizen of the United States, residing at Beaumont, in the county of Jefferson and State of Texas, have invented a new and useful Straightening-Machine, of which the following is a specification.

This invention relates to improvements in Straightening machines.

An object of the present invention is to provide a machine which will straighten pipes, rails, and allied structures in an expeditious manner.

A further object is to provide al machine of the class named in which friction cone bearings are provided which may be brought into contact with a beveled friction wheel so that the latter may be driven in either a forward or reverse direction and which beveled wheel frictionally drives a gear with a` invention herein disclosed, can be madey within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this specilication and forming a part thereof, the preferable form of my invention is illustrated, in which Figure 1 is a view in side elevation of my improved. straighteningmachine. Fig. 2 is a top plan view thereof, and Fig. 3 `is a view in rear elevation.

Referring to the drawings in which similar reference numerals designate analogous parts throughout the several views, a base is provided and includes the longitudinal beams 4t and a pluralityof transverse beams extending therebetween and which are bolted thereto. A transverse beam or bloc-k 5 extends between the longitudinal beams, is mortised therein as clearly illustrated iu Fig. 1, and forms an abutment against which the bent articles such as rails are placed which are to be straightened. In order to further `tire structure.

strengthen the transverse beam or abutment 5, the blocks 7 are rigidly secured to the beams `t and Contact with and hold against transverse shifting the said beam 5. A cross strut S is mortised between the blocks 7 and beams l and extends therebetween to further insure the absolute rigidity of the en- A cross strut 9 extends between the beams fl at their rear extremities and is mortised between the said beams and the holding blocks 10 which are mounted above and rigidly secured to the beams. A thrust beam 11 extends between the beams It and is mortised therein, and contacts with the front faces or ends of the holding blocks 10. The thrust bearing 12 is rigidly 'secured to the thrust beam 1l and is provided with an opening 13 extending centrally therethrough and through which opening extends the bending screw 14. The thrust beam is provided with the opening 15 extending therethrough, through which the bending screw may advance or retract. The bending screw is provided with the keyway 1G cut therein and which is engaged by the spline 17 so that the bending' screw while mounted for axial or longitudinal movement will be held against rotation. A bearing 1S illustrated by dotted lilies in Fig. l is carried by the transverse beam 19 and supports the forward portion of the bending screw and prevents the transverse. shifting thereof.

A gear wheel 20 is provided with the threaded aperture 2l extending therethrough and which receives the bending screw 14 therethrough. The said gear is provided with the collars 22 which contact with the thrust bearing upon one side and with the bearing 1S upon the opposite side. Thus when the gear is forcibly rotated, the gear being held against transverse shifting and the said bending screw being held against rotation, provides that the bending screw will be advanced or retracted according to the direction of rotation of the gear.

A superstructure is mounted upon and secured to the beams 11 and 1S and which superstructure includes the longitudinally extending beams 9.3 held in spaced relation by the cross members or beams 2li. The beams Zet carry the pillow blocks 25 which rotatably support the shaft Q6. The shaft 26 is provided with the spur gear 27 rigidly secured thereto and which meshes with the relatively larger spur gear 20. Suitable means are secured to the shaft 2G to prevent the longitudinal shifting thereof but which being of the conventional form are not illustrated. The rear extremity of the shaft 26 is provided with a friction beveled wheel 28, which is driven by t-he cone frictional wheels 29-29, the latter being mounted upon opposite sides of the beveled wheel and rigidly secured to the power driven shaft 30. Suitable blocks 31 are secured to the beams 23 and which blocls support the pillow blocks or bearings journaled in which and rotatably mounted thereby is the shaft 30. A set of loose and tight pulleys 38 are mounted upon the shaft 30 and by means of which the shaft 30 is forcibly rotated. The shaft 30 may slide in an axial direction to bring the cone wheels upon opposite sides of the beveled wheel into frictional engagement therewith to thus drive the beveled wheel in a forward or reverse direction, according to which of the cone wheels is in engagement therewith.

A strut bar Sil extends between the rear extremities of the beams 23 and projects beyond one of the same to form a supporting arm 85 to which the lever 36 is pivotally secured. The lever 36 is provided with the pivoted member 37 and collar 38 which latter engages the shaft 30 and is adapted to longitudinally shift the same by the shifting ,of the lever 3G. lThus, when a bent articleas illustrated in dotted lines at 6 is placed upon the beams et and in contact with the transverse abutment 5, it will be in the path of movement of the bending screw 14, which latter is provided with the rotatable end members or forms 89 secured to the front extremity thereof so that it will properly engage different sized pipes or allied structures of different cross sectional contours. The shaft 30 being power driven, a shifting of the lever 36 will bring one of the rotating cones into forcible contact with the beveled wheel 28 with the result that the said wheel and shaft 2G which is secured thereto, will be rotated in a given direction. The said motion will be imparted to the gear 2O through the intervention of the gear 27 which is in mesh therewith and secured to the shaft 26. The gear 2O being driven by power will either advance or retract the bending screw 111, according to the direction of rotation imparted to the said gear. Should the rotation be such that the bending screw will be advanced, the latter will come forcibly in contact with the bent article and will tend to straighten the same by forcing it into contact with the abutment 5, the edge of which is formed as a plane surface. '1`he reaction produced by the forcible contact of the bending screw with the bent article is transmitted to the spur gear 2O and which in turn reacts upon the thrust bearing 12 which is preferably an anti-Iriction ball bearing and which being rigidly secured to the thrust beam 11l will successfully withstand the strain. The thrust beam 11 being supported against shifting by the thrust blocks 1() and being bolted as well as mortised to the longitudinal beams t, will be sufficiently strong to withstand any stresses which may be brought to bear thereupon in the ordinary use of the machine. The fact that the cones Q9 rely upon friction to drive the beveled wheel QS forms a safety arrangement so that when the article is entirely straightened and is in rigid contact with the abutment 5, the increased thrust upon the beam 11 Will be prevented from rising to excessive values by a slipping of the cones and beveled wheel. 'lhus there will be no disastrous results aC- cruing` when the bending screw comes into forcible contact with the transverse abutment 5.

Havin g thus described my invention, what l claim is It straightening machine comprising a base, a transverse abutment with a plane side secured thereto, a bending screw mounted for sliding motion upon said base, means engaging said bending screw preventing the rotation thereof, a gear wheel provided with a threaded aperture extending therethrough mounted upon said bending screw, means for preventing the shifting of said gear wheel longitudinally of the said base, said means including an anti-friction thrust bearing, a superstructure carried by said base, a shaft rotatably mounted by said superstructure, a gear wheel carried by said shaft and meshing with the aforementioned gear wheel, a beveled friction wheel carried by said shaft, a shaft extending at right angles to the aforementioned shaft, two oppositely disposed cone friction wheels rigidly carried by said shaft and adapted to contact with the said beveled wheel upon opposite sides thereof, means carried by said last mentioned shaft for imparting rotation thereto, and a lever pivotally carried by said superstructure engaging said cone wheel carrying shaft adapted to shift the same in an opposite direction to bring one of the said cone wheels into contact with the'beveled wheel and to move the other of said cone wheels out of contact therewith.

In testimony that I claim the foregoing as my own, l have hereto affixed my signature in the presence of two witnesses.

BURVELL BOYKIN, JR. a

Witnesses A. l). LrrsooMn, E. L. BOYKIN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G. 

